<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>404</title>
</head>
<body>
<p>404</p>
<a href="/">首页</a>
<style>
body{
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 50px;
  height: 100%;
  width: 100%;
  position: fixed;
}
</style>
</body>
</html>